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TDA8948J Folha de dados(PDF) 9 Page - NXP Semiconductors |
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TDA8948J Folha de dados(HTML) 9 Page - NXP Semiconductors |
9 / 26 page TDA8948J_1 © NXP B.V. 2008. All rights reserved. Product data sheet Rev. 01 — 27 February 2008 9 of 26 NXP Semiconductors TDA8948J 4-channel audio amplifier 11. Static characteristics [1] A minimum load is required at supply voltages of VCC >22V: RL =3 Ω for SE and RL =6 Ω for BTL. [2] The amplifier can deliver output power with non-clipping output signals into nominal loads as long as the ratings of the IC are not exceeded. [3] With a load connected at the outputs the quiescent current will increase. [4] The DC output voltage, with respect to ground, is approximately 0.5 VCC. [5] ∆V O(offset) = |VOUT+ − VOUT−| [6] Channels 3 and 4 can only be set to mute or on mode by MODE2 when VMODE1 >VCC − 2.0 V. 12. Dynamic characteristics Table 8. Static characteristics VCC =17V; Tamb =25 °C; RL =8 Ω; VMODE1 =VCC; VMODE2 =VCC; VI = 0 V; measured in test circuit Figure 11; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Supply VCC supply voltage operating [1] 917 26 V no (clipping) signal [2] - - 28 V Iq quiescent current VCC = 17 V; RL = ∞ [3] - 100 145 mA Istb standby current - - - 10 µA Output pins VO output voltage - [4] -9 -V ∆VO(offset) differential output voltage offset BTL mode [5] - - 170 mV Mode selection pins VMODE1 voltage on pin MODE1 on mode VCC − 2.0 - VCC V mute mode 4.5 - VCC − 3.5 V standby mode 0 - 0.8 V VMODE2 voltage on pin MODE2 on mode: channels 3 and 4 [6] VCC − 2.0 - VCC V mute mode: channels 3 and 4 0 - VCC − 3.5 V IMODE1 current on pin MODE1 0 V < VMODE1 < (VCC − 3.5 V) - - 20 µA IMODE2 current on pin MODE2 0 V < VMODE2 < (VCC − 3.5 V) - - 20 µA Table 9. Dynamic characteristics SE VCC =17V; Tamb =25 °C; RL =4 Ω; fi = 1 kHz; VMODE1 =VCC; VMODE2 =VCC; measured in test circuit Figure 11; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Po(SE) SE output power VCC = 17 V; see Figure 7 THD = 10 %; RL =4 Ω 6.5 8 - W THD = 0.5 %; RL =4 Ω -6 -W VCC =20V THD = 10 %; RL =4 Ω -12 - W THD total harmonic distortion Po = 1 W - 0.1 0.5 % Gv voltage gain - 25 26 27 dB Zi input impedance - 40 60 - k Ω |
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